linux-kernel - [PATCH 2/2] virtio-net: pass gfp to add

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Date:	Thu, 29 Apr 2010 17:26:42 +0300
From:	"Michael S. Tsirkin" <mst@...hat.com>
To:	Rusty Russell <rusty@...tcorp.com.au>,
	"Michael S. Tsirkin" <mst@...hat.com>,
	Amit Shah <amit.shah@...hat.com>,
	Mark McLoughlin <markmc@...hat.com>, Tejun Heo <tj@...nel.org>,
	Eric Van Hensbergen <ericvh@...il.com>,
	Shirley Ma <xma@...ibm.com>,
	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] virtio-net: pass gfp to add_buf

virtio-net bounces buffer allocations off to
a thread if it can't allocate buffers from the atomic
pool. However, if posting buffers still requires atomic
buffers, this is unlikely to succeed.
Fix by passing in the proper gfp_t parameter.

Signed-off-by: Michael S. Tsirkin <mst@...hat.com>
---
 drivers/net/virtio_net.c |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 91738d8..fca44b2 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -339,7 +339,7 @@ static int add_recvbuf_small(struct virtnet_info *vi, gfp_t gfp)
 
 	skb_to_sgvec(skb, sg + 1, 0, skb->len);
 
-	err = virtqueue_add_buf(vi->rvq, sg, 0, 2, skb);
+	err = virtqueue_add_buf_gfp(vi->rvq, sg, 0, 2, skb, gfp);
 	if (err < 0)
 		dev_kfree_skb(skb);
 
@@ -386,8 +386,8 @@ static int add_recvbuf_big(struct virtnet_info *vi, gfp_t gfp)
 
 	/* chain first in list head */
 	first->private = (unsigned long)list;
-	err = virtqueue_add_buf(vi->rvq, sg, 0, MAX_SKB_FRAGS + 2,
-				       first);
+	err = virtqueue_add_buf_gfp(vi->rvq, sg, 0, MAX_SKB_FRAGS + 2,
+				    first, gfp);
 	if (err < 0)
 		give_pages(vi, first);
 
@@ -406,7 +406,7 @@ static int add_recvbuf_mergeable(struct virtnet_info *vi, gfp_t gfp)
 
 	sg_init_one(&sg, page_address(page), PAGE_SIZE);
 
-	err = virtqueue_add_buf(vi->rvq, &sg, 0, 1, page);
+	err = virtqueue_add_buf_gfp(vi->rvq, &sg, 0, 1, page, gfp);
 	if (err < 0)
 		give_pages(vi, page);
 
-- 
1.7.1.rc1.22.g3163
--
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